<p>The Shield Arms S15 Gen 3 Starter Kit for Glock&reg; 43X/48 3-Pack is the perfect way to boost the performance of your Glock 43X or Glock 48. Increase your capacity from the factory 10 rounds up to 15 rounds with 3 flush-fit, steel-bodied magazines. In order to run the Shield S15 Magazine, it is required to swap out your plastic mag catch with the included Shield Arms steel mag catch. The steel mag can wear down the plastic mag catch, eventually leading to reliability issues. If you use another manufacturer&#39;s mag catch, you may also have issues.</p> <ul> <li style=list-style-type: inherit;>3 Gen 3 S15 Magazines in black nitride</li> <li style=list-style-type: inherit;>Black nitride steel magazine catch</li> <li style=list-style-type: inherit;>Carry 15 rounds, flush fit</li> <li style=list-style-type: inherit;>50% increase in capacity over OEM</li> <li style=list-style-type: inherit;>Fits the Glock 43X and 48</li> </ul>